Big poster problems..

[coolestfairy.livejournal.com]

OK... SO I bought this huge poster, it is about 5 feet x 3 feet. I don't want it framed.. so I looked into getting it laminated, but that would cost me around $90.. which is way more than I want to spend (i only spent $18 on the poster). Does anyone know if it is possible or reasonable to get something this size dry mounted? AND.. if that wouldn't work, I remember reading somewhere (i checked the faq's...) about making a frame out of 2 pieces of plexi glass and bolts and stuff? anyone else heard about that?

Thank you for the help!!